01-12-2012, 04:46 PM
Climatic Condition
Final Presention-Climate Condation-Final.ppt (Size: 3.06 MB / Downloads: 43)
Hot and Dry Climate:-
Hot and dry climatic regions are characterised by very high radiation levels, ambient temperatures and relatively low humidity.
The design objectives in such a climate should be aimed at:
(A) Resisting heat gain:
Heat gain can be resisted by:
Decreasing the surface of the building exposed to the outside.
Using materials that take a longer time to heat up.
Providing buffer spaces between the living areas and the outside.
Decreasing ventilation during daytime in the summers.
Providing adequate shading devices.
Landform:
Regions in this zone are generally flat and heat up uniformly.
In case of an undulating site, constructing on the leeward side of the slope is preferred.
This protects the building from direct impact of hot winds which can be quite uncomfortable.
Open spaces and built form:
Open spaces such as courtyards and atria promote ventilation.
They can be provided with ponds and fountains for evaporative cooling.
Courtyards act as heat sinks during the day and radiate the heat back at night.
Grass can be used as ground cover to absorb solar radiation and aid evaporative cooling.
Earth berming can help lower the temperature and also deflect hot summer win
Colour and textures
Change of colour is a cheap and effective technique for lowering indoor temperatures.
Colours that absorb less heat should be used to paint the external surface.
Darker shades should be avoided for surfaces exposed to direct solar radiation.
The surface of the roof can be of white broken glazed tiles.
The surface of the wall should preferably be textured to facilitate self shading.